615 series Type Test Certificate - Arc protection - Merging unit - Motor protection - Transformer protection - 2 winding - Feeder protection - Voltage regulation - Capacitor bank protection - Interconnection protection - Busbar differential protection (high impedance) - Generator protection - Power management/Load shedding - Back-up protection - Type Test Certificate - 615 series Relion Protection and Control - 5.0 FP1 IEC